Pump



3, 1935. Y J. STAVLDERY 2,023,250

PUMP

Filed Sept. 6 1934 3 Sheets-Sheet l favor/$77 J. STALDER Dec. 3, 1935.

PUMP

Filed Sept. 6, 1954 5 Sheets-Sheet 2 lll II III III) ll| fmfen/br M zazw1935 J. STALDER 2,0235250 PUMP Filed Sept. 6, 1934 I 3 Sheets-Sheet 345: 5 ylgjg 5,2

Patented Dec. 3, 1935 UNITED STATE ATENT OFFICE 1 Claim.

This invention relates to improvements in pumps, especially of thereciprocating plunger or piston type, and the same is designed andspecially equipped to be mounted on the forepart of an automobile orpower driven conveyance and to be placed in gear with and operated bythe motor or engine of the vehicle.

The object of the invention is to construct a pump of the double actiontype to throw a steady and continuous stream when placed in operation,it is serviceable for any purpose where pumps are required, but by myconstruction when placed on the forepart of a motor driven vehicle thepump is especially valuable in the rural districts where Water isrequired to be pumped from streams, wells or cisterns or the like.

The pump is very serviceable for filling tanks, tank cars, watertroughs, or any source where water is required, it is also serviceablefor spraying trees, shrubs and plants for the destruction of insects,when used in this manner the fluid is supplied from a tank containingthe mixture to be dispensed.

The essential feature of the invention is to operate a reciprocatingpiston type construction by a rotary operated connection, and todispense with the use of steam or similar power for reciprocating one ofthe pistons.

Another feature is to provide a gear mechanism arranged to be .driven bythe motor shaft of a motor vehicle, this gear mechanism is connected toa piston mechanism whereby the pistons are given reciprocatory motion.

A further object is the general arrangement, construction andcombination of parts as will be fully hereinafter described and setforth in the claims.

Figure 1 is a top plan view of my complete pump.

Figure 2 is a central horizontal sectional view of the same,

Figure 3 is a vertical central sectional View.

Figure 4 is an end view with the upper end of the air dome broken ofi.

Figure 5 is a front view of the rotating mechanism made use of forplacing the reciprocating pistons in operation, the cover of the housingbeing removed.

Figure 6 is a vertical sectional view of the mechanism with the gearpinion centralized.

Figure 7 is a detail View of a portion of one of the end sections of thepump casing showing the position of the valve.

Figure 8 is a cross sectional view of the piston chamber taken on theline 88 of Figure 3, showing its connection with the driving mechanism.

Figure 9 is a side view of the pump shown in position on the front endof an automobile.

Figure 10 is a detail view of. the pump showing how the same may bedriven or operated by a hand lever. 5

In the general arrangement and construction of my invention, I provide apump casing comprising two end members H and i2 each provided with asuitable base l3 and suction pipe inlets M, to these inlets areconnected suction pipes l5 con- 10 necting approximately at the centerto a coupling it to which is connected the suction lead H which isplaced in the stream or water supply through which the fluid is suckedinto the pump.

The end members are also provided with sockets i8 into which is insertedthe ends of the piston cylinder is, and approximately midway of thesockets is formed a horizontal partition 25 which forms inlets ii to thecylinder. In the sockets and against the partitions are placed valvesupports 22 preferably in the form of rings, and against the same arehingedly suspended valves 23, these valves controlling the inflow of theliquid into the cylinder.

In the end sections, and above the partitions 29 25 are outlets Z ithrough which the liquid under pressure is driven or forced upwardlythrough valve seats 25 into pipes 26 and emptying into an air chamber ordome 27 from which the liquid is delivered by way of the discharge pipe28. 30

In the valve seats 25 are poppet valves 29 which rise under pressurewhen the liquid is forced through the passage, and drop in closedposition when the liquid is being sucked into the piston chamber passingthrough the flap valves located at the inlets.

In the piston chamber or cylinder l9 are positioned pistons 36 eachconnected to piston rods 3| and their ends in turn connected to a yoke32 having a central opening or bore 33 for the reception of a trunnion34 which forms a part ofv the rotary operating mechanism which I willnow describe, and which forms the vital part of my invention.

The rotary operating mechanism consists of a suitable housing 35 mountedand firmly held against the piston chamber by a clamping means 36. Inthe housing is mounted a gear wheel 31 supported on a short shaft 38which has bearing in the housing wall 39 and in the cover plate 40, andon the inner end of the shaft 38 is fixed a disc 4|.

In the. lower end of the housing is supported a drive shaft 42 on whichis a pinion 43 which is in mesh with the gear wheel 31 and by which thegear is placed in rotation. This shaft 42 may be provided with a clutchmechanism 44 for placing the shaft in and out of operation with a shaft45 which is designed to be attached to or otherwise connected to thecrank or drive shaft of the motor of the vehicle, and by which the pumpis placed in motion.

On the disc M is eccentrically mounted a gear pinion 46 held on saiddisc by the connection 41,

and on this pinion is a plate 48 provided with a trunnion 34 which isarranged to extend into the piston cylinder and operate in the elongatedslot 49, see Figure 2, and connected to the yoke 32 which controls thepistons.

The plate 48, in addition to being held to the pinion 46 by the means41, it is additionally held secure by the pins 50. The pinion carryingthe plate is in mesh with an internally toothed :gear rim which is heldfirm in the housing by the screws 52, and while the mechanism is turningthe trunnion will move evenly across the housing, or in other words thetrunnion will move horizontally and even with the slot 49 placing thepistons in reciprocatory motion in the cylinder.

The toothed gear rim 5! is provided with twice the number of teeth ofthat of the pinion 46 and the distance between connection 4! andtrunnion 34 equals the radius of the pitch circle of pinion 46 in orderthat the motion of trunnion 34 shall be along a straight line.

In Figure 5, I show by dotted lines the movement of the trunnion acrossthe housing, as the disc 4| rotates in the direction as shown by thearrow, it causes the pinion 46 which is in mesh with the stationary gearrim to rotate in the direction shown by the arrow thereon, during thismovement the trunnion 34 will travel horizontally from one side of thehousing to the other in a straight path, its position during its travelbeing shown by dotted lines.

All of the mechanism is placed in operation by the drive shaft 42, andby the rotary motion of the gear mechanism the pistons are placed inreciprocatory motion causing a double action to the pump.

Should it become necessary to operate the pump by hand, I place on thesquared end 53 of the short shaft 38, a hand operated handle 54, seeFigure 10, and operate it in a forward and back motion as shown bydotted lines in Figure 10. This is used when an emergency arises, andWhere the pump is installed other than in connection with a motor orother power driven means.

A pump of this type is adaptable for use on trucks used in street andhighway construction. It is useful for draining excavations, floodedcellars, and for any use that pumps may be put to, the same whenproperly positioned, being always ready for immediate use.

The pump when properly installed on the front end of a motor vehicle,has its drive shaft 45 placed in communication with the crank shaft ofthe motor, and by the means of an intermediate clutch or otherconnection mechanism the pump can be placed in and out of operation.

By the movement of the gear mechanism located in the housing, thetrunnion 34 which operates the pistons, is moved straight across thecenter line of the housing on a horizontal line, which movement iscontinuous back and forward during the movement of the gears, thus bythis action the pistons are reeiprocated, functioning properly in thepiston cylinder.

I do not desire to limit myself to this precise arrangement, as some andother changes may be made in the construction and arrangement of theinvention above set forth without departing from the real spirit andpurpose thereof; and it is my intention to cover by the following claimsany modification or modified form of structure or use of equivalentswhich may be reasonably included Within their scope.

Having fully described my invention what I claim is:

A pump of the character described comprising a pump casing in which ismounted a double acting piston mechanism, in combination with a rotatinggear mechanism by which the pistons are reciprocated, said gearmechanism comprising a gear housing fixed to the pump casing, said gearhousing comprising a casting having a circular depression on its oneend, a cover plate attached to its opposite end, an intermediate wallformed in the casting, a stub shaft having bearings in the cover plateand intermediate wall, a large gear wheel fixed to said stub shaft, adisc fixed to the one end of said stub shaft, a gear pinion positionedbetween the intermediate wall and the cover and meshing with the largegear, a drive shaft on which the pinion is mounted, and by which thegear mechanism is driven, an internally toothed gear rim fixed in thecircular depression of the gear housing, a gear pinion excentricallymounted on the disc and meshing with the gear rim, a plate fixed to thegear pinion, and a trunnion projecting from the fixed plate, saidtrunnion extending into the pump casing and connected with the pistonmechanism for reciprocating the same during the rotary motion of thegear mechanism, and a square end formed on the stub shaft on which maybe attached a hand operating handle when desiring to operate the pump byhand.

JACOB STALDER.

